IntelBX80677I77700K
IntelBX80648I75820K

4 Cores, 8 Threads @4.2GHz, Kaby Lake.
Release date: Q1 2017.

6 Cores, 12 Threads @3.3GHz, Haswell-E.
Release date: Q3 2014.

Real World Speed
Performance profile from 230,058 user samples
193,414 User Benchmarks
Best Bench: 110% Base clock 4.2 GHz, turbo 5.1 GHz (avg)
Worst Bench: 81% Base clock 4.2 GHz, turbo 1.35 GHz (avg)
Poor: 81% Great: 110%
SPEED RANK: 22nd / 1129
Gaming
Gaming 96%
Nuclear submarine
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 71%
Battleship
36,644 User Benchmarks
Best Bench: 103% Base clock 3.3 GHz, turbo 4.8 GHz (avg)
Worst Bench: 68% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 68% Great: 103%
SPEED RANK: 47th / 1129
Gaming
Gaming 85%
Aircraft carrier
Desktop
Desktop 82%
Aircraft carrier
Workstation
Workstation 75%
Battleship
Effective Speed
Effective CPU Speed
96.2 % Slightly faster effective speed.
+14%
84.7 %
SC Mixed
Avg. Single Core Mixed Speed
136 Pts Faster single-core speed.
+28%
106 Pts
QC Mixed
Avg. Quad Core Mixed Speed
469 Pts Slightly faster quad-core speed.
+13%
414 Pts
MC Mixed
Avg. Multi Core Mixed Speed
724 Pts 849 Pts Faster multi-core speed.
+17%
SC Mixed
OC Single Core Mixed Speed
153 Pts Faster OC single-core speed.
+20%
128 Pts
QC Mixed
OC Quad Core Mixed Speed
553 Pts Slightly faster OC quad-core speed.
+9%
507 Pts
MC Mixed
OC Multi Core Mixed Speed
811 Pts 1021 Pts Faster OC multi-core speed.
+26%
Market Share
Based on 11,527,860 CPUs tested.
Market Share
Market Share (trailing 30 days)
2.34 % Hugely higher market share.
+655%
0.31 %
Value
Value For Money
89.3 % Slightly better value.
+11%
80.8 %
User Rating
UBM User Rating
133 % Hugely more popular.
+102%
66 %
Price
Price (score)
$355 $330 Slightly cheaper.
+7%
Age
Newest
21 Months Much more recent.
+58%
50 Months
TDP
Thermal Design Power (TDP)
91 Watts Much more energy efficient.
+35%
140 Watts
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads 12 threads Much higher thread count.
+50%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+36%
22 nm
Base Clock
Base Clock Speed
4.2 GHz Faster base frequency.
+27%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.5 GHz Faster turbo frequency.
+25%
3.6 GHz
SC Int
Single Core Integer Speed
148 Pts Slightly faster single-core int speed.
+15%
129 Pts
SC Float
Single Core Floating Point Speed
157 Pts Faster single-core fp speed.
+21%
130 Pts
QC Int
Quad Core Integer Speed
532 Pts +4% 514 Pts
QC Float
Quad Core Floating Point Speed
574 Pts Slightly faster quad-core fp speed.
+12%
512 Pts
MC Int
Multi Core Integer Speed
745 Pts 967 Pts Faster multi-core int speed.
+30%
MC Float
Multi Core Floating Point Speed
869 Pts 1038 Pts Faster multi-core fp speed.
+19%
Series
CPU Architecture
Kaby Lake Haswell-E
Socket
Motherboard Socket
FCLGA1151 LGA2011-V3
Graphics
Integrated Graphics
HD 630 None
Launch Date
Launch Date
Q1'17 Q3'14
Cache
Cache
8 MB 15 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX 2.0 SSE4.2, AVX 2.0, AES
Lithography
Lithography
14 nm 22 nm
Recommended Price
Recommended Customer Price
$339.00 - $350.00 $389.00 - $396.00
Bus Speed
Bus Speed
8 GT/s DMI3 0 GT/s
Memory Types
Memory Types
DDR4-2133/2400, DDR3L-1333/1600 @ 1.35V DDR4 1333/1600/2133
Memory Channels
Max # of Memory Channels
2 4
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 630 None
Package Size
Package Size
37.5mm x 37.5mm 52.5mm x 45.0mm
Max # of PCI Express Lanes
Max # of PCI Express Lanes
16 28

More specs » More specs »
ADVERTISEMENT

The Core i7-7700K is Intel’s flagship Kaby Lake based CPU which is reported to have the same IPC as its predecessor, Skylake. Comparing the 7700K and 6700K shows that both average effective speed and peak overclocked speed are up by 7%. Most of the increase in average effective speed is explained by the 5% boost in base clocks from 4.0 to 4.2 GHz. The improved peak lab speed is attributable to a combination of better overclocking capacity and improvements in Intel’s speedshift technology which make the 7700K slightly more responsive. Kaby Lake also has marginally better HD 630 integrated graphics. The i7-7700K is priced similarly to the i7-6700K so for top end gaming and workstation builds, the 7700K is the clear choice for 2017. AMD’s Ryzen will release later this year so things could change at that time. [Jan '17 CPUPro]

MORE DETAILS

The Intel Core i7-5820K is the cheapest of three (5820K,5930K,5960X) new Haswell-E prosumer/enthusiast processors. The 5820K sports six physical cores and twelve threads which allow for enormous processing throughput. Unfortunately Intel have somewhat handicapped the 5820K by setting its base clock at just 3.3 GHz, 0.7GHz lower than the class leading 4790K. Comparing the 4790K and 5820K shows that the cheaper i7-4790K is significantly faster at both single and dual threaded workloads. The additional two cores found in the 5820K are not relevant to general computing and as such the 5820K probably makes a better server rather than consumer proposition. The Haswell-E X99 architecture also requires DDR4 RAM which is currently far more expensive than DDR3. Overall the 5820K is a very expensive option and probably best avoided by the vast majority of consumers.  [Sep '14 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) October 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

ADVERTISEMENT

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $370Nvidia GTX 1070 $358Samsung 850 Evo 250GB $78
AMD Ryzen 5 1600 $155Nvidia GTX 1060-6GB $249Samsung 850 Evo 500GB $120
Intel Core i7-7700K $355AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $147SanDisk Extreme 64GB $42
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $30
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $145SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback